Tapered tail washer for 1/2 inch bottom entry toilet cistern ballcock / float valve.
Note this 1/2 inch size refers to a British Standard Pipe Thread.
This washer fits OVER a 1/2 inch male BSP thread, the washer itself does not measure 1/2 inch.
Inside diameter is approx 22mm.
** BSP thread sizes are measured a special way - have a look at our information page for more details **